Dual-tire grip.



' vv. .B.-LASHAR.

` DUAL TIRE-GRIP. APPLICATION FIALED MAY 14. 1913.

' Lmn ,Patentedyeh 20,1917.

Armfmfrs www? By `a citizen of the UnitedStates,

llink cooperating with connectors WALTER B. LAsHAR, or BRIDGEPORT CONNECTICUT, AssIGNOR To AMERICAN CHAIN COMPANY, INCORPORATED, OF` BRIDGEPORT, CONNECTICUT. a' CoaroarrrIoN` or NEW YORK.

mienne.

. DUAL-TIRE GRIP.

v lApplication filed May 14, 1913. Serial No. 767,530.l

Ta aZZ 'wtom z't'may concern;

Be it known that I,l WALTER B. LASHAR, and resident of Bridgeport, Fairfield county, Connectiout, have made certain new and useful Inventions Relating to Dual-Tire Grips,-of which the following vis a specification, taken in connection with the accompanying drawing, forming part of the same.

This invention relates especially to tire grips adapted for use on`wheels provided.

with dual resilient tires f the solid type, the grip preferably comprising v`a series of about a dozen or so metallic grip'units' which-may be of integral construction and with advantage provided with substantially flat working faces and inwardly projecting holding lugs. to Vconnect thereto a securing. extending between the different grip units and adapted to extend suliiciently within the annular ref cess in the tire to maintain the units in proper alinement.- .The grip units may be provided with any desired ynumber of diagonally arranged arms, two arms giving good results when extending laterally from thev body of the unit on both sides thereofv at about 50 degrees apart, it being desirable yto make the arms of gradually decreasing thickness as they extend away from the body so as to more readily embed themselves in the tire. I

In the accompanying drawing. showing in a somewhat diagrammatic wayv several illustrative embodiments of the invention,

Figure 1 is a side view of ya wheeltoy-which `the grip has been applied.

Fig. 2 is an enlarged transverse section Fig. 3 is a side'sectional View` substantially along the lineB-S of Fig. 2; and

Fig.- 4 is a face view of a portion of the grip and tire. "l

This grip is adapted to coperate with multiple solid tire 'wheels having any suitable construction, thefwheel illustrated hav'- ing the felly 1 and metallic rim 2 thereon in `which the desired number of tires preferably of thev solid type `may bfarranged, such as 3, 4, Iwhich may, as indicated have the annular-'recess 5 between them, these tires of course being held in place in any suitable way which .it is unnecessary toI show in detail.l The illustrative fori'n of grip may comprise a suitable series of metallic grip units preferably havingsubstantially flat Working faces for contact with the rat-enten rieb'. eo, mit.; j,

ground, some 8 to 16 or s'o of such units being useful and 12 units of good results on many classes-of vehicles. j

These grip units may with advantage bef` made integral and formed of suitable v,tou h resistant material, suchas tough steel or example. The grip units may as illustrated l comprise a suitable central portionl or body from Ywhich the desired number of arms eX- tend laterally on both sides Vof thetire, at

this kind giving suitablevangles preferably of about 40 to 70 A degrees where four arms are used, to give a suicientlydiagonal arrangement to mimmize side-slip or skidding, while still main.-

taining ample traction in connection with the road surface. The body of the grip unit 7 may as indicated in Fig. l Lbe provided with four diagonally arranged .arms 8, 9,10v andv 11 which may extend laterally entirelyorpart way across the adjacent tires and be ,about 50, degrees apart, this diagonal arrangement also promoting the gradual em-' .bedding of these arms into the yielding tire s0 astoA correspondingly minimize bumps ing or other undesirable effects. For this purpose it is alsodesirable to make the arms" of gradually decreasing thickness as theyr extend away from t e body 7 towardthe tipsV or points 12 asshownin Figs. 2 and 3, and foi'this and structural reasons it is also de sirable in some cases'to give the arms a more or less gradually decreasing width as they:A extend away from the body. l 4

Any4 desired form ofr securing means may be employed in connectionwith th'ese grip .units and the units may be provided with sey,curingmembers' formed Integral therewith or otherwise ,connectedy thereto.

As shown in lthe drawings `the securing member may with advantage be in the form of a securing link 17 extending inside the body 7 of' the grip unit and having its securing ends 19 preferably bent inward or 'downward as indicated .in Fig. 3. vSuch securing link may be conveniently held in' proper position by forming on the 'gripv unit integral holding lugs, `such as 13, 14, which may be bent over 'the sides of the' ysecuring lmember so that theirends 15 securely grip the same and hold it in proper lposition especially in connectioirl with the downwardly bent ends jwhich-fminimize longitudinal Shifting of the links. Any ysuitable form of connectors may.v

b e attached torth Securing members 01'. body both sides thereor and 'aboutvfifty .llllkS 011 the grip units, the connectors fand"` securing members being preferably located well within. the working faces of they units-- toprevent undesirable contact with thefy road and abrasion and in this way also the' con? nectors are adapted to lie within the annular groove between the -tire sections so as tov maintainI the unit in proper lateral alinement. Suitableconnector chains may be sedl for this purpose and as illustrated sections oi curbed chain -6 may be provided'at eachaend with doubledconnectorhooks 16,

vsuch as are used in connection therewith for tread orcross chains for regular. chain grips.

- These attaching hooks areadapted to engage Ithe ends of the securing links so as to space' the grip units the desired distance apart aroundthertireand one or more of these 2()l .connector chains. may be provided with a suitabletightener such as -18 shown in Fig. l to allow the convenient assembly `of the grip! on fthe `wheel and to enable it to bei4 tightened.l lfrom time to time to the desired extent.u 1 ,i p i. i

Grips of? this character; have provedhighly desirable vunder service conditions because of their long service due to the fact c that the grips units which alone come in contact witlrthe ground 'are formed of heavy andystrongmaterial having ample Wearing properties,v all other partsbeing located inside, or away from the working faces of the units. ias shown in Figs. 2 and 3 the lateral extendingrarms of which' two more or less *may lie-used on cach side ofy the unit and project'suiiiciently away from-the tire tread to give'ainple tractionand to prevent slipping on the-usual road surfaces. The diagonal arrangement ofy these arms promotes the 'gradual embedding thereof into the tire so as to correspondingly lpromote' good riding conditions andfthe diagonal arrangement, especially where four or more arms are used also greatly minimize side slip.

vThis invention lias'been described in connection 'with a number of illustrative ein'` bodiments, forms, proportions parts, materials and arrangements, to t'e details of which `disclosu`re the Iinvention' j is not of "course to be liiii'ited, sincewhat is claimed as new and what i"s`desired to b'e secured4 by Letters Patent ,clain'istY F y i.. The tire grip adaptedfor use onwheels provided, with dual resilient solid type tires, comprising a series of about a dozen integral metallic grip units havingl substantially ilat working faces, eachy unit being formed with a body provided with inwardly projecting holdingl lugs, ai securing link having its centralfportion gripped by said holding lugs and having -inwardly bent securing ends, saidgrip unitV having four diagonally-'arranged arms extending laterally v fromvsaid is set Vforthin the appended degrees apart on each side, said arms being of gradually decreasing width and thickness away fromsaid body, and iexible Vconnector chains provided with ldoubled connector hooks engaging the ends of said securing links to connect said grip units and adapted 1to extend within the .annular recess in the 'provided with inwardly projecting holding `lugs, a securing linkgripped by' said holding lugs, said `grip unit having four diagonally arranged `arms V extending laterallyl from said body on both sides thereof, said arms being ofgradually. decreasing thickness away from said'body, and connector chains engaging the ends of said securing links to connect said grip `units and'adapted to extend within the annular recess in the tire to maintain said units in substantial alinement. i

l 3. The tire grip adapted for use on wheels provided with dual resilient solid type tires, comprising a series of integral metallic grip units having substantially fiatworking faces,

each unit being formed with afbody and a connected securing member, :said grip unit having foui.diagoi1ally arranged arms exl tending laterally fromsaid body on both sides thereof and about fifty degrees apart on' each side, `said arms being of gradually decreasing thickness Vaway from said body, and flexible connectors engaging said securing members to connect said grip units andl adapted to extend within the annular recess in the tire to maintain said units in substantial alinement.

i '4. The ltire gripv adapted for use on wheels provided with dual resilient solid type tires, comprising aI series of metal-lic grip units, each formed with a body and a connected securing member, said grip unit having four diagonally arranged arms extending laterally from said body on both sides thereof, said arms being ofv gradually decreasing thickness away from said body, and connectors engaging saidfsecuring members to connect said grip units and adapted toy extend within the annular recess in the tire to maintain said units in substantial alinement. 5.A The tire grip adapted for use on'wheels providedv with dual resilient solid type tires,

comprising 'a series of metallic grip units having substantially flat working faces, each unit being formed with a body and a pluralityof diagonally arranged arms extending laterally from said body on both sides there of,'said arms being of decreasing thickness lawayfroni said body, and chain connectors'130 'adapted for to cormect said grip units and adapted to extend within the annula recess in the tire to maintain said units in substantial alinement.

6. The integral metallic tire grip unit use on wheels provided with dual resilient solid type tires havinga substantially iat working face and formed with a. body provided with inwardly projecting holding` lugs, a securing link having its central portion gripped by said holding lugs and having inwardly bent securing ends, said grip unitA having t'our diagonally arranged arms extending laterally from said body 'on both sides thereof and about fifty degrees apart on each side, said arms being of gradually decreasing width and thickness away from said body.

7. The integral metallic tire grip unit adapted for use on wheels provided with dual resilient solid type tires having a sub# stantially fiat working face and formed with a body provided 'with inwardlyprojecting holding lugs, a securing link having its central portion gripped by said holding lugs .and having inwardly bent securing ends, said grip unit having four-diagonally arranged arms extending laterally from said body on both sides thereof, Asaid arms being of decreasing thickness away from said body.

S. The metallic tire grip unit adapted for use onwhcelsfprovided with dual resilient solid type tires having a substantially fiat wairhing face and formed with a body and a connected securing member located inward away it'rom the working face of the unit(` said grip unit having a plurality of diagonally arranged arms extending laterally from said body on both sides thereof. said arms being of decreasing thickness away from said body.

9. The metallic tire grip unit adapted for use on wheels provided with dual resilient solid type tires having a substantially flat working face and formed with a body and a connected substantiallyv central securing member locatedinward a way from the working face otl thevunit, said grip unit having a plurality of diagonally arranged arms extending laterally from said body on both sides thereof, said arms being of decreasing thickness away from said body.

WALTER B. LASHAR.

iVitnesses i HARRY L. DUNCAN, 'Jessie B. Kai. 

